/// <summary>
/// Given a schema and a bunch of column names, create the BoundSchema object. Any or all of the column
/// names may be null or whitespace, in which case they are ignored. Any columns that are specified but not
/// valid columns of the schema are also ignored.
/// </summary>
public static RoleMappedSchema CreateRoleMappedSchemaOpt(ISchema schema, string feature, string group, IEnumerable <KeyValuePair <ColumnRole, string> > custom = null)
{
Contracts.CheckValueOrNull(feature);
Contracts.CheckValueOrNull(custom);
var list = new List <KeyValuePair <ColumnRole, string> >();
if (!string.IsNullOrWhiteSpace(feature))
{
list.Add(ColumnRole.Feature.Bind(feature));
}
if (!string.IsNullOrWhiteSpace(group))
{
list.Add(ColumnRole.Group.Bind(group));
}
if (custom != null)
{
list.AddRange(custom);
}
return(RoleMappedSchema.CreateOpt(schema, list));
}
/// <summary>
/// Creates a RoleMappedData from the given schema and role/column-name pairs.
/// This skips null or empty column-names, or column-names that are not found in the schema.
/// </summary>
public static RoleMappedData CreateOpt(IDataView data, IEnumerable <KeyValuePair <RoleMappedSchema.ColumnRole, string> > roles)
{
Contracts.CheckValue(data, nameof(data));
Contracts.CheckValue(roles, nameof(roles));
return(new RoleMappedData(data, RoleMappedSchema.CreateOpt(data.Schema, roles)));
}